EASY
10th CBSE
IMPORTANT
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The flow of energy in an ecosystem is always:

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Important Questions on Our Environment

EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Multiple Choice Questions (MCQs)>Q 47
The excessive exposure of humans to ultraviolet rays results in:
(i) damage to immune system
(ii) damage to lungs
(iii) skin cancer
(iv) peptic ulcers
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Multiple Choice Questions (MCQs)>Q 48
Which of the following gets the minimum energy through the food chain in an ecosystem?
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Multiple Choice Questions (MCQs)>Q 49
A food chain comprises of a cat, seed-eating bird, plants, and dog. The organism which will have the maximum concentration of harmful pesticides coming through the food chain is most likely to be:
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Multiple Choice Questions (MCQs)>Q 50
An aquatic food chain comprises of the organisms like tadpoles, weeds, fish and water beetles. The organism which gets the minimum energy through this food chain is:
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Multiple Choice Questions (MCQs)>Q 51

Most of the water surface of a lake is covered with algae. These algae are the part of the food chain which also includes small fishes, birds, larvae, and big fish. Which of the following will obtain the maximum energy?

MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Multiple Choice Questions (MCQs)>Q 52
If the energy available at the producer level in a food chain is 150 J, how much energy will be transferred to tertiary consumer?
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Multiple Choice Questions (MCQs)>Q 53
If the energy transferred to a tertiary consumer in a food chain is 10J, how much energy was available to the primary consumer?
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 3 Biology>Chapter 5 - Our Environment>Multiple Choice Questions (MCQs)>Q 54
In addition to wheat plants, a crop field ecosystem has organisms such as snake, peacock, eagle and mice. If the wheat plants are sprayed with pesticides periodically, which of the following will have the minimum concentration of pesticides in the body?